Installation manual

INSTALLATION SECTION 3
17
WIRING AND PANEL
GENERAL:
All solar system control is managed by the main ‘Solar Station’. This includes all power
wiring. The main controller and any ancillary electrical items will be located on the èSolar
Stationê.
There are many variations of systems for control e.g. multiple collector and cylinder sensors
and pumps including variation of systems for primary heating control. The individual technical
specification will provide the information for the specific system for your application. Which
ever system is supplied it will be selected and set on the ‘Solar Station’ via the controller.
All sensors and powered electrical equipment are wired directly into the main terminal rail.
Where high power items are required (e.g. large pumps and immersion heaters) or equipment
switching separate relays, these will be supplied pre-fitted on the ‘Solar Station’ possibly with
a power contactor box.
The pump will always be pre-wired on the ‘Solar Station’. If relays and contactor boxes are
required, all connections on the 'Solar Station' will be pre-wired (see Fig 6).
The following instructions will be based on the simplest systems ie. single cylinder, single
collector field, single pump with reference to other types. It also shows an example with relay
contact for primary heating control and with an electric immersion heater complete with
separate power supply to demonstrate the relay boxes.
RELAY BOXES:
All outputs from the controller are 230V 50Hz, with limited current.
When the output does not require 230V eg. volt free contacts, a relay box is used to enable
the 230V output to open and close a connection.
When the output power is too high for the controller a relay is again used but this time with
a second protected power supply. The controller will switch the relay to allow the required
device to be powered from the secondary supply.
Please refer to the schematic layouts of the ‘Solar Station’ for indication of wiring
requirements
WARNING:
ALL APPLIANCES MAY BE OPENED ONLY
WHEN MAINS VOLTAGE HAS BEEN SAFELY CUT
OFF AND IS PROTECTED FROM RESTARTING.